Valve-reseating tool



Feb 9, 192e 5e@ rye MMA INVENTOR ATTORN EY WITNESS:

` Feb. 9,1926.l 1,572,752?.

G. H. NORTH VALVE RESEATING TooL Filed August 15, 1924 2 sheets-sheets mvENToR ATTORNEY wir/15552 Patented Feb. 9, 1926.

Fries.-

Gnoaen H. NORTH, or KANSAS CITY, Missonni.

vALvn-nnsnn'rne Toor..

application filed Aug-ust 15, 1924. -Seiai Nc. 732,210.

Be it known that I, GEORGE II. Nourri-r, a` citizen ot the United Sta'teai'e'sirling at Kansas City, in the `county of vJackson and State ot Missouri, have inventedncw and useful Improvements in /Ialvc-Reseating Tools, ol which the following is a sp'ecilication.

This invention relates to tools intended 'tor use by automobile mechanics and others, and hasfor its object the provision of a novel tool which is particularly well adaptedv for reaming out, enlarging or refacing valve seats or openings in internal combustion engines and the like.

An important object is the provision ot a tool ot this character which is` fully adjustable whereby not 'only to act upon valve openings or seats of dilterent sizes, but also to act selectively onthe lvalve openings and the seat separately whereby thearea of the seat may be made greater or less, depending upon circumstances orthe wishes of the operator. o y y v Another object is the provision of atool ol this character which is lprovidedwith removable guide elements the intention 4being that a plurality of these guide elements be pro-vided, a selected one of which maybe used depending upon the size otl the valve stem guide in the motor worked upon.

Yet another object is the provision Vof a tool of this character which will be simple and inexpensive in manufacture, easy yto adjust and use, positive in action, durable in service, and a general improvement in the art.

ullith the above andother objects and ad-l vantages in view, the invention consists in the details of construction, to be hereinafter more `fully described, and claimed, and ilj lustrated in the. accompanying drawings, in which:

Figure 1 is a side elevation of the tool showing it in the act of reaming out a valve opening in an engine, a portion of the engine being` represented in section.

Figure 2 is a view partly in elevation and partly in sections showing the body of the device.

Figure 3 is an end elevation looking toward the cutter blade.

Figure l is a view similar to Figure 1 but showing the tool in the actot working upon the valve seat.

Figure 5 is a detail `view of the device kshinvin'g the nut member in section.

Y Figure G and 7 are. detail views showing' dil'lerent sizes of guide elements and Figure 8 is 'a detail' perspective view oi one of the blades,

mlieiferring more particularly to the draw gs, the letter A designates a portion ot' an gine having a valve opening therein which vit is desired to dress out or `rean'i.V As is well known, a valve opening of this type has two portions, one portion B constituting the (mening proper and the other portion C constituting' the seat for vthe valve which is used in connection therewith. Quite naturally, it maybe necessary only to reface or dress the `seat itself whereas in some cases it is really necessary 'to ream out the hole itself, thisdetail depending` upon the nature 'of thevworlr to be done. i

In carrying out the invention, I provide an elongated stem orbody member 1Q which includes avt-hreaded intermediate portiony11 and an unthreaded shank portion 12 terminating in a reduced threaded extension 13 upon which is mounted aliandle 14 ot suitable si'zel yand shape. At thefend opposite theshandle the body lO'is somewhat enlarged and orinedjwifth a plurality of 'pairsof ears 15 and a-centrally arranged threaded socket 16. Thel'p'airs of ears 'are provided with alining apertures 17. p i,

Pivoted. between the pairs of ears are blades 18 held in place by means of screws or ,bolts 19 which pass through the blades and through the alining or registering'holes 17 in Vtheears 15.V These blades are normally urged` upwardly and toward `'each other by meansfo'l` c oil orings AQ Olwhich might be connected ivith the successive blades but which are `here 'represented as passing through holes 21 formed .in the blades.V In this way it is quite obvious that a single ringlil{e spring member may be provided instead of a plurality. However, it should be understood that there is absolutely no limitation as to this detail as it is obvious that any other elastic or spring means might be provided for urging these blades in an upwardly extending direction. The outer edges 22 of the blades are sharpened so that they will be capable ofhaving a cutting etlect upon the metal at the open-y ing B or at the seat C depending upon circumstances.

In order that the blade members may be moved and held in any desired adjusted position7 I malte use of a shell member 23 which has a central hub 24 formed with a threaded bore screwed into the threaded intermediate portion 11 of the body. This shell member is of such diameter that the edge thereof will engage upon the upper edges ofthe blades 18 for moving the blades as may be desired.` Threaded upon the intermediate portion 1l ot the body is an adjusting nut 25 which env-ewes against the shell 23 and which is operable to move tlc :shell longitudinally with respect to the body vfor ary/'ing' the position of the blades.

Quite miturally:4 it is imperative that guide means be provided for centering` the device properly with respect to the hole to be dressed out or reamed. In carrying' out this :teature l malte use of yan elongated stem 26 which is formed with a threaded end detachably engaged Within the screw threaded socket 1G above referred to. It is true that in some instances, the valve guide 'D in the motor is not of the same diameter or in other words it should be stated that in some motors the lguidel has a greater diameter than in others. templated that a plurality of such ,guide stems be provided, any one of which may be used in connection with the tool depending upon the size of the openings through the valve guide. In Figure Y I have shown a stem 2? which is of larger diameter than the stem` 26 but formed with a reduced threaded extension 28 which will act ex actly the same as the threaded end of the stein 26. Regardlessk ot the size of the guide stem employed, it is evident that the stem is screwed into the socket 1G so that`it may subsequently be slipped through the valve guide D to :torni a centering; device for the tool. y'

In the operation, it is apparentthat after the tool is placed in position the nut is adjusted so that the shell is moved in such a way as to bring' the blades 18 to the desired position depending upon the size of the khole worked upon. If it is the portion B of the hole which is to be reained out, itk

evident that the blades may be permitted to extend upwardly at a more acute angle To take care ot this, it is con-l than if it is the seat portion D which is to be reamcd or dressed. p The two dilterent positions and actions are illustrated in Figures l and 4t respectively.

Assuming; that all necessary adjustments have been made, it is quite apparent that when the operator grasps the handle 14 and rotates the tool, the edges 22 of the blades act to ream the n'ie'tal at the hole portion B or C as the case may be and either enlarge the holeor reface the valve seat depending' upon what is desired.

From the foregoing description anda study of the drawings it will be apparent that I have thus provided a simply constructed, inexpensive and very easily adjusted and operated tool for the purpose specified, which will efficiently perform all the functions for which it is intended. Owing to the simplicity of the construction, it is readily apparent that there is very little to get out of order and'that the device should have a long and satisfactory life.

jzVhileI have shown and described the should be understood that Ik reserve the right to make such changes in the form, f

other end of the body beingformed with a plurality of spaced ears, blades pivoted between said spaced ears and havingtheir outer edges sharpened, spring means engaging said blades norn'ially urging' them in one direction. a shell member slidably eng'aged upon the body and engagcable with said lblades whereby to movethe same into adjusting position, and a nut member screwed upon the thrcade/l intermediate por-- tion of the body and engragijinp said shell for moving the same. y

In testimony whereot ture.

I affix my signa.-

enonlen H. NoRTn. 

